.app-wrap {

    .nav-header {
      li {
        float: left;
        list-style: none;
        padding: 4px;
        font-weight: bold;
      }
      &:after {
        content: '';
        display: inline-block;
        float: none;
      }
      border: 1px solid gray;
      padding: 4px;
  
    }
  
    .app-main {
      border: 1px solid red;
    }
    
  }
  
  
  .about-me-wrap {
    
    .container {
      .side {
        float: left;
        border: 1px solid gray;
        width: 120px;
      }
      
      .main {
        border: 1px solid green;
        margin-left: 120px;
      }
    }
  }

  